Adept EX SmartContoller - Manual (Page 87)

Chapter 7: Adept DeviceNet
NOTE: Adept does not supply 24 V on the controller to power the DeviceNet bus. A separate
power supply is required to power the components on the DeviceNet bus.
NOTE: It is important that devices connected to the network have a terminating resistor con-
nected between CAN-H (white) and CAN-L (blue). See Termination of the DeviceNet Network on
page 91
Configuring DeviceNet
The Adept SmartController EX motion controller has a default configuration such that, if you
plug in a DeviceNet module configured with MAC_ID 1 and a baud rate of 125 kbps, the first
64 inputs and 64 outputs will automatically be mapped as signals 1289 to 1352 and 257 to
320, respectively. This makes the DeviceNet plug and play.
For other configurations, use the Adept ACE software for software setup. This assigns the con-
troller signals to the physical ports of the DeviceNet nodes. Refer to the Adept ACE User's
Guide for details on configuring DeviceNet.
NOTE: The local setting baud rate must match the DeviceNet node’s setting.
7.4 DeviceNet Physical Layer and Media
The DeviceNet physical layer and media specifications are published in the ODVA manual,
chapter 9, volume 1. It describes possible topologies and components of the physical layer of
the DeviceNet.
The figure Trunk Lines and Drop Lines Made of Thick and Thin Cable on page 88 shows sev-
eral possible topologies. The DeviceNet specifications also specify system grounding, mixing of
thick and thin cable media, termination, and power distribution.
The basic topology is the trunkline-dropline topology. This topology uses separate twisted-pair
buses for the distribution of signals and power. The specifications allow trunk lines and drop
lines made of thick or thin cable. The baud rate, maximum distance from end-to-end of the net-
work, and cable size are dependent on each other. See the table Features of a DeviceNet Net-
work on page 88 for further details.
Adept SmartController EX User’s Guide, Rev. B
Page 87 of 96